When can birth defects result during which trimester of her pergancy when drinking?

Birth defects can occur at any time during pregnancy due to alcohol consumption, but the first trimester is particularly critical. This is when the baby's organs and systems are developing, making it more susceptible to the harmful effects of alcohol. Drinking during this period can lead to fetal alcohol spectrum disorders (FASDs) and other developmental issues. However, alcohol can also have negative effects in the second and third trimesters, impacting growth and brain development.